early-access version 1255

externals/libressl/crypto/objects/obj_lib.c

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+/* $OpenBSD: obj_lib.c,v 1.15 2018/09/08 10:31:24 tb Exp $ */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to.  The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *    "This product includes cryptographic software written by
+ *     Eric Young (eay@cryptsoft.com)"
+ *    The word 'cryptographic' can be left out if the rouines from the library
+ *    being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ *    the apps directory (application code) you must include an acknowledgement:
+ *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed.  i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <openssl/err.h>
+#include <openssl/buffer.h>
+#include <openssl/lhash.h>
+#include <openssl/objects.h>
+
+ASN1_OBJECT *
+OBJ_dup(const ASN1_OBJECT *o)
+{
+	ASN1_OBJECT *r;
+	char *ln = NULL, *sn = NULL;
+	unsigned char *data = NULL;
+
+	if (o == NULL)
+		return (NULL);
+	if (!(o->flags & ASN1_OBJECT_FLAG_DYNAMIC))
+		return((ASN1_OBJECT *)o); /* XXX: ugh! Why? What kind of
+					     duplication is this??? */
+
+	r = ASN1_OBJECT_new();
+	if (r == NULL) {
+		OBJerror(ERR_R_ASN1_LIB);
+		return (NULL);
+	}
+	data = malloc(o->length);
+	if (data == NULL)
+		goto err;
+	if (o->data != NULL)
+		memcpy(data, o->data, o->length);
+	/* once data attached to object it remains const */
+	r->data = data;
+	r->length = o->length;
+	r->nid = o->nid;
+	r->ln = r->sn = NULL;
+	if (o->ln != NULL) {
+		ln = strdup(o->ln);
+		if (ln == NULL)
+			goto err;
+		r->ln = ln;
+	}
+
+	if (o->sn != NULL) {
+		sn = strdup(o->sn);
+		if (sn == NULL)
+			goto err;
+		r->sn = sn;
+	}
+	r->flags = o->flags | (ASN1_OBJECT_FLAG_DYNAMIC |
+	    ASN1_OBJECT_FLAG_DYNAMIC_STRINGS | ASN1_OBJECT_FLAG_DYNAMIC_DATA);
+	return (r);
+
+ err:
+	OBJerror(ERR_R_MALLOC_FAILURE);
+	free(ln);
+	free(sn);
+	free(data);
+	free(r);
+	return (NULL);
+}
+
+int
+OBJ_cmp(const ASN1_OBJECT *a, const ASN1_OBJECT *b)
+{
+	int ret;
+
+	ret = (a->length - b->length);
+	if (ret)
+		return (ret);
+	return (memcmp(a->data, b->data, a->length));
+}